Hello,
I think that the ejector stressed can be ruled out. A colleague inspected a part just opening the mold, no ejection, and the marks were already there. :-/
Thanks for the help.
This is the best photo that I could get, not very good though.
I still have to try heating them. I'll let you know of my findings.
Hello to all,
thank you for your answers.
It is very difficult to capture the defect in a photo as you have to turn the part around to properly see the defect. I'll try to take a photo that I can share.
The marks appear in the front side while the ejectors and slides are on the back side of...
This defect happens mostly when working with ASA in molds with satin surface finishes.
When we raise the packing pressure in order to eliminate sink marks there comes a point where marks start to appear in the seen face. The marks appear just where the ejector pins, slides and logos are, and...